How it worksAs suggested above, time gravity fillers are often used for filling of corrosive products. But sometimes the products being filled are so aggressive that special construction methods are required. Harsh factory environments or where the product being filled can also be particularly aggressive on machinery. This includes not only chemical plants plants producing strong acids or bleach but also food plants using brine or sugar solutions in their products. In both cases, even the factory air alone contributes to the accelerated degradation of the machinery.